Handmaiden became immediately angry with me after the first discussion with Visas, and afaik that means I can't turn her into a jedi later, is this fixable ingame/with cheats?

Edit: Found solution. Other online comments tell you to download the Kotor Save Editor (KSE) and change the following values in your savegame (under Globals > Numerics):

000_Hand_Angry to 0
003EBO_Visas_Hand to 0

But for my game, it was also necessary to change a value called something like 000_Hand_Finale back to 0 as well.